Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01d8d2e9766f747…

MALICIOUS

PDF

79.9 KB Created: 2021-09-05 05:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 38666cd2234fe20a4dffc651a0ec182c SHA-1: 7c02acf44e6c5e00a93f66a918fef870d6e1e56d SHA-256: d01d8d2e9766f7476be7279beb89af528b377ce9da88b2f111b1bafc327e4006
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various compromised websites and disposable hosting domains, often with 'cv template' or 'online' in the URL parameters. These links likely serve as lures to download further malicious payloads, aligning with a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://huntic.ru/uplcv?utm_term=cv+template+pdf+online PDF link annotation
    • http://1mosref.ru/ckfinder/userfiles/files/kejijasiwivav.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070301f627b1---vepulipizuwewadesaxa.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/13832151877.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dda513100a---mimimowe.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/88152117540.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/57143325762.pdfIn PDF document text
    • http://palami.by/images/file/satanagakax.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/depasuraxotawilokida.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/461e5d5d689688880d55513b925fd6c8/fedokotagudovidudej.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/pofowoxabonirotezavisa.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/c1q7a1ngvldo53sicbh8os3dg7/pimonekuvunojeburezezo.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa999650cc---gurad.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/sesivekageliwap.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/c109f6acfa0ec27309f060db45cec45b/simexurisofupu.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/cf072ad1ee1fef12f20c2eb1db833884/tixapuberak.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/fiwivozirujuvigivutaf.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/88394403773.pdfIn PDF document text
    • http://allasclub.com/campannas/file/13545262079.pdfIn PDF document text
    • http://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/nupirakokazipedagomuna.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/20724034005.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/momujanerokus.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/84017880418.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/20829031645.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FF 17360 bytes
SHA-256: ed7b6cc4fdedbdcae4b55c09830921bbfa07a16ad658d5c3bf6aff0d8ab61c8a
font_01_sfnt_off00010246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10246 10488 bytes
SHA-256: 1f91945b13a7ac6cf74811f3b3b3092a645ed38c629e1615733e3bb10d8a61e3
font_02_sfnt_off00011a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1